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Betty Lou Mahnke

December 20, 1924 — April 30, 2024

South Sioux City

Betty Lou Mahnke, 99 of South Sioux City passed away Tuesday, April 30, 2024. A memorial mass will be 11:00 A.M. Tuesday, May 7, 2024 at St. Michael’s Catholic Church in South Sioux City. Visitation will be one hour prior to the service time at the church. Burial will be at St. Michael Cemetery. 


Betty was born the daughter of Sylvester and Anna (Schafer) Sandage on December 20, 1924 in Sioux City, Iowa. She graduated from Central High School. Betty married Charles A. “Chuck” Mahnke also from Sioux City on August 22, 1944. At which time Chuck was in the Navy based out of San Diego, CA. They moved to back to Sioux City in 1950, where they were in the grocery business, co-owning Church’s Grocery. Charles died in 1994.  Betty was a checker at National Food Store, and bookkeeper for IBP and Orkin. 


She was a member of the Ladies of LaSalette, the Catholic Daughters of America, and the coffee club of South Sioux City. 

Betty is survived by her children, Stephen Mahnke, Rebecca (Rudy) Pospisil and Michael (Brenda) Mahnke; son-in-law, Carroll Fisher; grandchildren, Jason (Mindy) Mahnke, Cheryl (Chad) Oldenkamp, Nicholas (Lyndsay) Pospisil, Matthew (Amanda) Pospisil, Michelle (Chris Cogdill) Mahnke, and Mark (Carter Gronseth) Mahnke; great-grandchildren, Kelsie, Katie and Emily Mahnke; Danny and Jacob Oldenkamp; Atticus, Revan, Braxton, and Cohen Pospisil. 


She was preceded in death by her parents; husband, Chuck; daughter, Theresa; siblings, Vester, Phyllis, Dolly, and Grace; daughter-in-law, Patricia; and great-grandson, Austin.

To order memorial trees or send flowers to the family in memory of Betty Lou Mahnke, please visit our flower store.


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